Clip



April 7, 1953 E; J. HELDMAN Erm. 2,633,609

CLIP

Filed July 29, 1950 Patented Apr. 7, 19-53 CLIP Ernest J Heldman', Hartford, lConn., and Samuel Jamison, Springfield, Mass., assignorsftoChic-Y epee Manufacturing Corporation, acorporaton of Massachusetts g Application July 29,1950, Serial No.'17 6,7.28

7 Claims. ,(Cl. 19-e-131).

This invention relates vto a condensing trumpet support asl an improvement to ycertain textile drafting mechanisms. l

The Aprimary function of the textile drafting machine is to reduce the diameter of a ber strand, to straighten curled and kinked fibers, and to lay them parallel. The strand is then twisted into a yarn of suitable size andwound onabobbin. Casablancas describes the essential features of this operation inU. Si Letters Patent No. 2,202,755.'

For 'purposes of exemplication we shall describe anembodiment of our invention that can be applied to the conventional Saco- Lowell Roth systemdrafting mechanism.

In lthe accompanying drawings:

Fig. 1 shows a plan-section through the drafting rolls .of a Saco-Lowell Roth drafting mechanism unit with a partial cutaway-to show one embodiment of the invention installed.v

Fig. 2 shows a partly diagrammatic cross-section through the drawing rolls of a Saco-Lowell Roth' drafting mechanism with one type of support clipinstalled.

Fig. 3 is a perspective view of a pair of trumpets f mounted on their associated tie-bar. f

Fig. 4 isa .perspective view of one form of de-Y vice embodying our invention- Referring to Figs. 1 and 2, a strand ID passes through the drafting rolls of a conventional spinning frame. The rstrands are led between the usual pair of back drafting rolls I I and I2 as they come down from the creel which is not shownl here. The three pairs of drafting rolls, II--|2, IS-M, IB--I'I are held in bearings IB in the roll stand and are operated at increasing surface speeds in the direction of the advancement of the strand. The bottom middle drafting roll I4 has knurled bosses which carry an endless belt or apron 2|. Between the middle and front bottom rolls I4 and I7 there is the nose-bar I9, a horizontal member attached to orsecured integrally with roll stand 24. The nose-bar is of triangular cross. section and extends laterally acrossthepath of the strand. The front edge \of\this 'bariis closeto the front bottom vdrafting rolliiand actsl as aguidearound which the apron 2| passesg A small diameter, lightweight slip roll I5 runs in contact with the front end of the apron 2| abov the nose-bar I9.

The fibers are\g\ripped by the three top rolls I l, I3 and I6 as theyadvance t ough the mechanism and are supported an carried by the apron 2I between the middle and front drafting rolls. The slip roll I5 resting on the bers close to the from fou werks with the apronfz |l 1an-'prnvide a-jlight controlllnggnip In the course of drawing the strandmany'tem tile drafting machines use a condensing trumpet 22 to'reduce the cross section of the strand for greater compactnessf-and at the vsame time-to reduce ny bers. Better cohesion between'the fibers can thus be achievedtgiving-a 4moresati'sA i factory drafting. Fiber Wastage and lintdn thev spinning room are reduced by this' expedient. lA condensing trumpet has a funnel-shaped central aperture preferably formed with av top slot Jto, facilitate insertionfandremoval `of the strand.

The trumpet must ,allow freedom of motion of' the strand in a direction parallel to the axis of s* rotation of the drafting rolls so that the vsame portion of the drafting rolls is no t always-exposed to wear by the strand. To achievethis end two adjacent trumpets .are secured to anex-A tendible tie-bar.. The pair of trumpets and their associated tie-bar are then fitted snugly in place y between .the top and bottom front drafting'drolls in the nips of two pairs ofrolls.,

trumpets.

drafting upon completion Aof cleaning `Van awkward and ineicient operation.

One object of our invention is to avoid this diiculty :by providing a simple modification Afor textile drafting machines designed With this:

shortcoming. Our invention `is an inexpensive device whichwill supportthe trumpet structure to a member of the drafting cradle. AO'urtru'mpet 1 supportclip has the further advantage of being light and compact sothat it can Vbereadily se- When,

cured into position Y or be removed. mounted itdoes not interfere with the normal operation of any of. the closely associated. mem-- bers vof the textile drafting mechanism.

Extending across the kback of -thenip between the top and bottom: front drafting rolls-16' and surfaces oftheserolls at the nip-are lthe trumpets 22, mountedfin `pairs on anextendible'trumpet" tie-bar 23. The strand lll, as it is being drafted, is delivered from between the slip roll I5 and the apron 2l through the aperture of the trumpet 22, the latter serving to compact the fibers as previously described. The vstrand then passes through the nip between the top front drafting roll I6 and the bottom roll l1 after which it is twisted and wound on a bobbin.

One preferred form of our invention is a clip 20, shown in relation to the drafting mechanism in Figs. 1 and 2 and in perspective in Fig, 4. The function of this clip is to support the trumpet tie-bar 23 and its associated trumpets 22 when the top front feed roll I6 is removed periodically -to clear it of lint. In this embodiment of our invention the support clip 20 is a pair of yieldingly resilient arms with a looped lateral extension at their junction. The tie-bar 23 can be readily inserted in the clip and fits within the loop. The portion of the clip arms near the ends of the device conform to a cross section of the nose-bar to permit a stable snap-fit around the nose-bar I9. The clip 20 affords freedom for lateral movement of the trumpet tie-bar 23 in the direction parallel to the axis of rotation of the drafting rolls to prevent the strand from always running over the same portion of the rolls. A slight movement of the tie-har transverse to the axis of rotation of the drafting rolls is tolerated by the clip loop. Opposed recesses, as shown in Fig. 4, may be made on the surface of clip 20 if desired to provide a finger gripl It will be understood that modifications may be necessary to conform to the particular configuration and dimensions of the trumpet tie-bar, of the nip between the front drafting rolls, and of the nose-bar or other horizontal frame member used as a support. The essential feature is that the trumpets are prevented from dropping out of their position on the surface of the bottom front roll when the top front drafting roll is removed for cleaning.

The invention claimed is:

1. In a mechanism for drawing textile rovings having a pair of drafting rolls, an endless belt, a nose-bar for guiding the belt, a pair of condensing trumpets normally supported by the drafting rolls, and a tie-bar connecting the trumpets; a device adapted to be secured to the nose-bar and to surround the tie-bar while allowing the tiebar to slide in a direction parallel to the axes of rotation of the drafting rolls, said device being adapted to support the tie-bar when a drafting roll is removed.

2. In a mechanism for drawing textile rovings having a pair of drafting rolls, an endless belt, a, nose-bar for guiding the belt, a pair of condensing trumpets normally supported by the drafting rolls, and a tie-bar connecting the trumpets; a loop adapted in configuration to pass around the nose-bar and having a projecting retaining loop which surrounds the tie-bar to slideably support the tie-bar while allowing the tiebar 'to move in a direction parallel to the axes of rotation of the drafting rolls.

3. In a mechaninsm for drawing textile rovings having a pair of drafting rolls, an endless belt, a nose-bar for guiding the belt, a pair of condensing trumpets normally supported by the drafting rolls, and a ltie-bar connecting the trumpets; a resilient clasp yieldingly conforming to the cross section of the nose-bar and adapted to be secured to the nose-bar and to pass around the tie-bar to sldeably support the tie-bar while allowing the tie-bar to move in a direction parallel to the axes of rotation of the drafting rolls.

4. In a mechanism for drawing textile rovings having a pair of drafting rolls, an endless belt, a nose-bar for guiding the belt, a pair of condensing trumpets normally supported by the drafting rolls, and a tie-bar connecting the trumpets; a resilient clasp yieldingly conforming to the cross section of the nose-bar so that it will grasp the nose-bar and having a loop surrounding the trumpet tie-bar to sldeably support the tie-bar while allowing the tie-bar to move in a direction parallel to lthe axes of rotation of the drafting rolls.

5. In a mechanism for drawing textile rovings having a p'air of drafting rolls, a cradle associated with these rolls, a pair of condensing trumpets normally supported by the drafting rolls, a tiebar connecting the trumpets, and a horizontal member of said cradle in proximity to the trumpet tie-bars; a loop adapted to conform to a cross section of the horizontal member and to grasp the horizontal member and having a projecting retaining loop which surrounds the tie-bar to support the tie-bar to this horizontal member of the cradle while allowing the tie-bar to move in a direction parallel to the axes of rotation of the drafting rolls.

6. In a mechanism for drawing textile rovings having a pair of drafting rolls, an endless belt, a nose-bar for guiding the belt, a pair of condensing trumpets normally supported by the pair of drafting rolls, and a tie-bar connecting the trumpets; a resilient clasp yieldingly conforming to the cross section of the nose-bar so that by clip tension it can be secured to the nose-bar and having a projecting loop which passes around the trumpet tie-bar to sldeably support said Itie-bar while allowing the tie-bar to move in a direction transverse to the axes of rotation of the drafting rolls and also in a direction parallel to the axes of rotation of the drafting rolls.

7. In a mechanism for drawing textile rovings having a pair of drafting rolls, an endless belt, a nose-bar for guiding the belt, a pair of condensing trumpets normally supported by the drafting rolls, a tie-bar connecting the trumpets; a clip having a pair of yieldingly resilient arms, conforming to 4the cross section of the nose-bar at their free ends so that it can be snapped onto the nose-bar, and having a looped lateral extension at the junction of the arms conformed to surround the tie-bar allowing the tie-bar freedom of motion in a direction parallel to the axis of rotation of the drafting rolls and also a slight motion transverse to the axis of rotation of the drafting rolls.

ERNEST J. I-IELDMAN. SAMUEL JAMISON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,448,192 Butler Mar. 13, 1923 1,870,095 Casablancas Aug. 2, 1932 2,202,755 Casablancas May 28, 1940 2,206,360 Litty July 2, 1940 

